Turn-table.



E. BURR.

TURN TABLE. APBLIUATION FILED 11.13, 1911.

1,004,143. Patented Sept. 26,-1911.

Ji if Inventor UNITED STAT-12$ Parasite caries.

fEnoAn BURR, or RENO, NEVADA.

TURN-TABLE.

Application filed April 13,

Town whom it may concern:

Be 1t known that I, EDGAR Bonn, a citizen of the United States, residing at Reno, in

the county of l/Vashoc and State of Nevada, have invented a newand useful 'lurn lable, of which the following is a specification.

' Thisinvention relates to turn tables of the "character shown in United States Letters Patent No. 664,460 granted to me on Decem- I 10 her 25, .1900 on a turn table.

The object of the present invention is to improve," strengthen and simplify the con 'part ofthis specification-Figure lis a plan View of the improved turn table of the present invention. Fig. 2 is a transverse vertical section through the construction illustrated in Fig. 1.

Like reference numerals indicate corres ending parts in the different figures of tlie drawing.

- The reference numeral 1 indicates the base of the improved turn table and 2 the pedestal thereof. The pedestal 2 preferably is. formed in its upper surface with a circular socket or recess 3 which is surrounded by a pair of concentrically arranged races at and 5 111 which are mounted circular series of anti-friction devices or balls 7, 8. The table 14 rests upon the concentric series of balls 7 and 8 and is formed in its lower surface with said balls.

motive when concentricall arranged races 10 toreceive t its center, the table 1.4: is provided with 9. depending pin 11. which fits closely into the circular socket 3' and serves,

in conjunction with the balls 7 and 8 to prevent any tipping or other displacement of the table.

The table 14 as'indicated best in Fig. 1 is in the form of a substantially rectangular platform which is intended to receive a locothe device is used as a railway turn table. The transversely I extending Specification of L tters Patent.

Patented Sept. 26, 1911.

1911. Serial No. 620.916.

table or platform. 14 may however represent the cansmvay of a bridge. The ends of the table are slightly curved, as shown, and project outwardly beyond the base 1. The sides of'said table are straight. Arranged beneath each endof the transversely extending table 14 and seemed thereto isa pair of chairs or supports iii--15 and l(3-],G. Each of the chairs has mounted for rotation therein a grooved wheel 17. Arranged in each of the chairs 1: -l(i below the wheel 17 is a ball or anti-frictiondevice 18 which bears against the base 1 of the turn table.

It is found in practice that by mounting the pairs of chairs 1.516 beneath the ends of the transverse platform 14, four sets of said chairs will sullice to support the platform at the two ends thereof beneath the rails-on which the locomotive is supported. By thus reducing the number of chairs to a minimum the friction incident to the contact of the anti-friction balls 18 with the base 1 is likewise reduced to a minimum and the table is found in practice to be more readily operated than when the chairs are eonnectedwith the base and his thus necessary to arrange them at equi-distant points around the periphery of the table. Moreover it is found in practice that the center pin 11 depending from the upper surface of the table' 9, in conjunction with the plurality of series of anti-friction devices 7 and 8 is'more ellicient in stcadying the table and in holding it against displacen'ient upon the pedestal 2;than is the upwardly projecting center pin showii in my earlier patent.

. While the said table of the present invention has been described as being adapted y particularly for use in handling locomotives, it is nevertheless to be understood that it can be used in reference to swing bridges, and as a rotary platform for other purposes and in other connections if desired.

The turn table of the present invention is strong, simple, durable and ctnnparatively inexpensive in construction as well as thoroughly eflicient and easily operated.

It is to be noted from Fig. 1 of the drawing that the diameter of the outer series ofballs 8 is almost equal to the width of the table 14. It is also to be noted that the inner balls 7 preferably are smaller than the outer balls 8.

What is claimed is:

A turn table of thecharacter described .having a base, a pedestal thereon, a' plurality of sets of concentrically arranged anti-friction balls on the upper end of said pedestal the balls of the inner series being smaller in diameter than the balls of the outer series, a transversely extending table mounted on said pedestal and engaging said anti-frietion balls, the ends of said table projecting laterally beyond the limits of the base, a plurality of chairs at each end of said table, each of said chairs having a wheel journaled therein, and an anti-friction ball carried by each chair and engaging the wheel thereof 1 at one side and the balls of the turn table at the other side.

In testimony that I claim the foregoing as 15 my own, I have hereto allixed my signature in the presence of two Witnesses.

EDGAR BURR. Witnesses B. H. BRIGGS, C. N. BROWN. 

